Don't tarpit localhost connections

[tinc] / src / autoconnect.c

diff --git a/src/autoconnect.c b/src/autoconnect.c
index 5651f54..d771078 100644 (file)
--- a/src/autoconnect.c
+++ b/src/autoconnect.c
@@ -1,6 +1,6 @@
 /*
     autoconnect.c -- automatic connection establishment
-    Copyright (C) 2017 Guus Sliepen <guus@tinc-vpn.org>
+    Copyright (C) 2017-2022 Guus Sliepen <guus@tinc-vpn.org>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -19,16 +19,18 @@
 
 #include "system.h"
 
+#include "autoconnect.h"
 #include "connection.h"
+#include "crypto.h"
 #include "logger.h"
 #include "node.h"
 #include "xalloc.h"
 
-static void make_new_connection() {
+static void make_new_connection(void) {
        /* Select a random node we haven't connected to yet. */
-       int count = 0;
+       uint32_t count = 0;
 
-       for splay_each(node_t, n, node_tree) {
+       for splay_each(node_t, n, &node_tree) {
                if(n == myself || n->connection || !(n->status.has_address || n->status.reachable)) {
                        continue;
                }
@@ -40,14 +42,15 @@ static void make_new_connection() {
                return;
        }
 
-       int r = rand() % count;
+       uint32_t r = prng(count);
 
-       for splay_each(node_t, n, node_tree) {
+       for splay_each(node_t, n, &node_tree) {
                if(n == myself || n->connection || !(n->status.has_address || n->status.reachable)) {
                        continue;
                }
 
-               if(r--) {
+               if(r) {
+                       --r;
                        continue;
                }
 
@@ -72,7 +75,7 @@ static void make_new_connection() {
        }
 }
 
-static void connect_to_unreachable() {
+static void connect_to_unreachable(void) {
        /* Select a random known node. The rationale is that if there are many
         * reachable nodes, and only a few unreachable nodes, we don't want all
         * reachable nodes to try to connect to the unreachable ones at the
@@ -80,9 +83,9 @@ static void connect_to_unreachable() {
         * are only a few reachable nodes, and many unreachable ones, we're
         * going to try harder to connect to them. */
 
-       unsigned int r = rand() % node_tree->count;
+       uint32_t r = prng(node_tree.count);
 
-       for splay_each(node_t, n, node_tree) {
+       for splay_each(node_t, n, &node_tree) {
                if(r--) {
                        continue;
                }
@@ -109,12 +112,12 @@ static void connect_to_unreachable() {
        }
 }
 
-static void drop_superfluous_outgoing_connection() {
+static void drop_superfluous_outgoing_connection(void) {
        /* Choose a random outgoing connection to a node that has at least one other connection. */
-       int count = 0;
+       uint32_t count = 0;
 
        for list_each(connection_t, c, &connection_list) {
-               if(!c->edge || !c->outgoing || !c->node || c->node->edge_tree->count < 2) {
+               if(!c->edge || !c->outgoing || !c->node || c->node->edge_tree.count < 2) {
                        continue;
                }
 
@@ -125,10 +128,10 @@ static void drop_superfluous_outgoing_connection() {
                return;
        }
 
-       int r = rand() % count;
+       uint32_t r = prng(count);
 
        for list_each(connection_t, c, &connection_list) {
-               if(!c->edge || !c->outgoing || !c->node || c->node->edge_tree->count < 2) {
+               if(!c->edge || !c->outgoing || !c->node || c->node->edge_tree.count < 2) {
                        continue;
                }
 
@@ -144,7 +147,7 @@ static void drop_superfluous_outgoing_connection() {
        }
 }
 
-static void drop_superfluous_pending_connections() {
+static void drop_superfluous_pending_connections(void) {
        for list_each(outgoing_t, o, &outgoing_list) {
                /* Only look for connections that are waiting to be retried later. */
                bool found = false;
@@ -165,9 +168,9 @@ static void drop_superfluous_pending_connections() {
        }
 }
 
-void do_autoconnect() {
+void do_autoconnect(void) {
        /* Count number of active connections. */
-       int nc = 0;
+       uint32_t nc = 0;
 
        for list_each(connection_t, c, &connection_list) {
                if(c->edge) {